Selector



Jan. 20, 1925.

1,523,383 A. H.4 ADAMS SELECTOR Filed May 5, 1922 Patented Jan. 20, 1925.

UNITED STATES PATENT OFFICE.

ARTHUR H. ADAMS, OF LAKEVILLE, CONNECTICUT, ASSIGNOR TO WESTERN ELEC- TRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SELECTOR.

Application filed May 5, 1922. semi No, 553,802.

T0 @ZZ 107mm t may concern:

Be it known that I, ARTHUR H. ADAMS, a. citizen of the United States, residing at Lakeville, in the county ot Litchtield, State otl Connecticut, have invented certain new and useful Improvements in Selectors, ot. which the following is a full, clear, concise, and exact description.

This invention relates to selectors for use in telephone systems. It has tor its object the provision of a simple, rugged, etlicient and easily maintained switch ot' the coordinate type.

The structure which embodies the present invention comprises a plurality of sets ot longitudinally7 movable bare wire conductors coordinately arranged, the conductors ol? each set having contact devices attached thereto at each point ot intersection with the wires ot the other set, the contact devices at any point vof intersection being brought into engagement by the conjoint operation in a predetermined order of two sets ot conductors. f

In the drawings, Fig. 1 is a side view of the essential elements ot' a selector; Fig. 2 is an end view of the same partly in section; Fig. 3 is a detail showing the tornia- H t-ion of the Contact devices,.and Fig. 4 is a diagrammatic representation illustrating the manner in which connections between conductors of different coordinate sets are made.

This switch follows closely in tion the method ot operation. set forth and described in the patent to J. N. Reynolds, No. 14,236, reissued December 26, 1916. In that patent the element known as the trunk bar is operated lirst and thereafter the eiement known as the line bar is operated. Connection between the contacts ot the operated trunk bar and line bar is made, whereupon the trunk bar is released to normal position and the connection is maintained through the continued operation ot the line bar.

In the present structure the three conductors 1, 2 and 3 controlled by the magnet 4 may be considered a line bar and the conductors 5, 6 and 7 controlled by the magnet 8 may be considered a trunk bar. Six trunk bar magnets are shown, in Fig. 1 ot which the titth, here numbered 9, is shown in its operated position. It' while magnet 9 is operated magnet 4 beits operacomes operated, then connection will be established between conductors 1 and 5, 2 and 6 and 3 and 7, respectively, and in the manner set forth in the Reynolds patent hereinbefore referred to, the magnet 9 will become deenergized and as long as magnet 4 remains energized the connection will be maintained. v

The elements of the line bar comprising essentially conductors 1, 2 and 3, include also an armature 10 controlled by magnet 4 pivoted on the trame 11 and controlling a triangular piece ot insulating material 12. Attached to this piece ot insulating material 12 are the three conductors 1, 2 and which are stressed by springs 15, 14 and 13, respectively. At each intersection ot the line bar with a trunk bar a contact device 16, shown in detail yin Fig. 3, is provided. This contact device comprises essentially a resilient spring wire secured to the conductor 1 by being iirst loosely wrapped thereabout and then tightly wrapped thereabout.

The trunk bar, comprising essentially the conductors 5, 6 and 7, includes also three springs 1T, 1S and 19 :t'or stressing the conductors 6 and 7, respectively, and a triangular shaped piece ot insulating material 2O attached to an armature 21 controlled b v the magnet S and pivoted on the trame as shown in Fig. 2. Each of the conductors 5 has threaded on it, at intervals corresponding with the intersection with line bars, cupshaped contact pieces such as 23 shown in de* tail in Fig. B. This contact piece consists ot a long shank which at one end tlares into a concave annular portion and is coated on its upper side with insulating material 24. The contact piece may be secured to the con ductor 5 in any desired manner either by solderingl or'by crimping. As shown in Fig. 5 a layer ot' solder 25 secures the contact piece 23 to the conductor 5. The end ot spring contact 16 is ot such a shape as to be adapted to engage the 'flared portion of a contact piece either on its upper or lower surface Fig. 4 is a detailed diagrammatic drawing illustrating the manner in which ythe contact devices operate. There are shown three line bar conductors 26, 27 and and two trunk bar conductors 2f) and 36. The line bar conductor 2T is shown in normal position and the line bar conductors 26 and 2S CII process or" establishment;

are shown in their operated positions. Trunk bar conductor 29 is shown in its normal `position and trunk bar 30 is'shown in'its opcond-uctor 29 has been iirst operated. Thereafter 26 has been operated 'and 29 has been returned to normal and hence a connection between conductor 26 and conductor 29 has been established. This is shown by the position of the .resilient spring 32 which is Vhooked under the contact Ypiece 33. Also 'according to 'this view a connection between conductor 28 and conductor 30 is in `the Thus, conductor 30 has been moved upwardly. Since the line bar conductor 26 had preiously been operated the resilient spring '31 rested against the insulated portion or" the Contact piece 3d and uponl the upward movement of the trunk bar conductor 30 the bent end of the resilient :spring 3l has been caught inthe bell shaped portion oithercontact piece 34C. Due' to the coating of insulation nocionnection is made betweenconduct'or26 and conductor 30; 0n the other hand, now that conductor 3'() has been moved, conductor 28 is moved toward the left and a connection is established between conductors 28 and 30V by the resilient spring 85 actually Ytouching the conductor 30. The resilient spring 36 also attached to conductor 28 is moved over into'contact with contact piecei37, but no connectio'nis established atrthis point due to the coat of insulating material on'the shank of the contact piece 37. The next operationto take place will be 'theV return or'conductor 8O toits normal position, whereupon the resilient spring 3l will vasv suine the position of the springB andthe resilient` spring will. assume the position of the spring 32. A

lVhen connection between a trunk bar conductor and a line bar conductoris no longer desired, the line bar conductor is allowed to resume its normal position, suoli as is indicated by conductor 27. In this case such resilient spring contact devices as 'are in the position of spring 32 will ride over the undersidev of the contact pieces with which they are engaged and will assume the position of vthel resilient spring 38;

lVhat is claimed is:

l. A selector comprising a plurality of sets of longitudinally movable bare wire conductors coordinately arranged, cup

sliap'e'd contact fdevices and cooperating resilient springs'secured to said conductors at l'each point of intersection of said conductors,

lduct'ors coordinately arranged, contact de vices comprising cup-shaped members insulated on one sideand uninsulated on the lother side and resilient springs secured to said conductorsat -each pointfof intersection of said conductors, and means for bringing said devices into engagement by moving a set of conductors carrying cupesliaped members and 'a set of yconductors carrying resilient spring contact devices. j i

VA selector comprising afp'lurality of sets 'of movable bare wire `conductors coordi-V nately arranged, contact 'devices secured to each conductor at each point oft intersection of said conductors, certain of said Contact 'deviceshaving van insulated andan nninsulated portion, `other of said contact devices having a bent portion, and means in one condition n torl bringing said contact devices into engagement on an insulated portion andV inanother condition onjan uninsulated portion.

4. Av selector of the ycross-bar type in which the bar elements comprise sets oi' lone Vgitudinally movable bare wires having-icon# tact pieces secured thereto,fcertainctfthese contact device-s having a. flared portion'.

g r 1 Y L l A Q A selector of the cross-bar type in which the bar 4elementscomprise'sets 'of longitudinally movable bare wires, Certain sets having flared contact devices and other sets v liavingspring cont'act ldevices 4arranged. to

cooperate in one condition with lsaidilared lcondition on their contact ldevices on their concave surfaces and ine In witness whereof, I hereunto subscribe Y myname this 2nd day of May A. D., 1922. ARTHUR H. ADAMS. 

